Help guys!! please.. Admob problem

Hello guys, i’m not so familiary with the code in general but i made a game, with the help of AI,
i tried to convert the html css javascript (3 separate files) into apk, first i tried with cordova the game compiled just good, but wherever i tried to add admob it failed.. now i tried with the capacitor (7.2, after i downgraded to 5.7, not working) i was getting closer and closer (getting thise in logcat : Capacitor/Console com.luci3alin.weaponlegend E File: https://localhost/script.js - Line 3881 - Msg: Error in AdMob prepare/show process: TypeError: AdMob.showRewarded is not a function
after some changes i got this in log cat :

 2025-06-04 01:07:25.881  4088-4088  Capacitor/Console       com.luci3alin.weaponlegend           I  File: https://localhost/script.js - Line 3724 - Msg: Attempting to show AdMob rewarded ad for free gold.

2025-06-04 01:07:25.882  4088-4088  Capacitor/Console       com.luci3alin.weaponlegend           I  File: https://localhost/script.js - Line 3869 - Msg: AdMob plugin (@capacitor-community/admob) found. Proceeding with ad request.

2025-06-04 01:07:25.882  4088-4088  Capacitor/Console       com.luci3alin.weaponlegend           I  File: https://localhost/script.js - Line 3874 - Msg: Attempting to initialize AdMob plugin.

2025-06-04 01:07:25.883  4088-4088  Capacitor/Plugin        com.luci3alin.weaponlegend           V  To native (Capacitor plugin): callbackId: 128138130, pluginId: AdMob, methodName: initialize

2025-06-04 01:07:25.883  4088-4088  Capacitor               com.luci3alin.weaponlegend           V  callback: 128138130, pluginId: AdMob, methodName: initialize, methodData: {}

2025-06-04 01:07:25.887  4088-4088  Capacitor/Console       com.luci3alin.weaponlegend           I  File:  - Line 334 - Msg: undefined

2025-06-04 01:07:25.887  4088-4088  Capacitor/Console       com.luci3alin.weaponlegend           I  File: https://localhost/script.js - Line 3876 - Msg: AdMob plugin initialized.

2025-06-04 01:07:25.887  4088-4088  Capacitor/Console       com.luci3alin.weaponlegend           E  File: https://localhost/script.js - Line 3890 - Msg: Capacitor AdMob plugin found, but AdMob.showRewarded method is NOT available or not a function after initialization attempt.

2025-06-04 01:07:25.888  4088-4088  Capacitor/Console       com.luci3alin.weaponlegend           E  File: https://localhost/script.js - Line 3891 - Msg: This indicates a core plugin installation or linking issue. Please verify plugin version and Android Studio project setup.

also this command don’t work either ./gradlew clean build i got errors when i try to compile
Please i need some help

Not sure why you would downgrade to Capacitor 5. It is no longer supported.

Assuming you are running v7 of GitHub - capacitor-community/admob: Community plugin for using Google AdMob, then you need to be on Capacitor 7.

Some troubleshooting steps are here - Troubleshooting Android Issues | Capacitor Documentation

Also sharing what commands you are running would help. You’ve run npx cap sync android?